Itoshiki Nozomu is the world's most negative person. To his way of thinking, there is no hope or meaning in this existence. Even the three kanji of his name become the two-kanji word zetsubou, "despair", when compressed. What an ironic twist of fate, then, that he becomes teacher to a class containing his precise opposite, the invincibly positive-minded Fuura Kafuka.

(taken from animenewsnetwork)

-Please note the first set of chapters have been removed at Entropy's request if you want to read please visit them <3

The series Sayonara Zetsubou Sensei has been licensed, it is not available in Manga Fox.